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27 May 2022 | Story Leonie Bolleurs | Photo Charl Devenish
Prof Tomas Vetrik
Prof Tomas Vetrik, Professor in the Department of Mathematics and Applied Mathematics, recently delivered his inaugural lecture on the UFS Bloemfontein Campus.

Prof Tomas Vetrik, Professor in the Department of Mathematics and Applied Mathematics at the University of the Free State (UFS), recently delivered his inaugural lecture on the Bloemfontein Campus.

His research area is graph theory, and he mainly focuses on the degree-diameter problem, graph indices, and metric dimension of graphs.

Research focus

According to Prof Vetrik, mathematics was always his favourite subject in school. He also excelled in maths at university and decided to enrol for a course on graph theory while working on his master’s degree. “I liked it, so I also chose topics from graph theory for my PhD thesis,” he says.

In 2014, at the age of 32, he was appointed Associate Professor at the UFS, after postdoctoral research at the University of KwaZulu-Natal and working at the University of Pretoria. An NRF-rated researcher, he has published close to 75 research papers, a third of that as a single author in some of the most well-known journals in his area. Moreover, he was also research supervisor of three PhD and three master’s students.

International collaborations

In the eight years since his appointment at the UFS, Prof Vetrik has made research visits to universities from 14 different countries that have invited him for research collaborations. 

“I am often overseas. I like working from different places. It is interesting to me, and it helps me to be productive,” says Prof Vetrik, explaining some of the inspiration behind his mathematical ideas.

In the next two years, he would like to study more general mathematical problems beyond his current research area.

He says he is addicted to his research. “It overshadows all my other interests.” 

On the rare occasion when he is not working on his research, Prof Vetrik states that he has to keep himself busy. Unable to relax and do nothing, he likes to do sports of some kind or to travel. 

“I am a simple person. I do not even have a TV at home. I use an old-fashioned mobile phone that cannot access the internet,” he says.


News Archive

New digital planetarium first of its kind for Sub-Saharan Africa
2013-10-10

Mr Andrew Johnson, Sky-Skan engineer, explains how the dataprojector of the new digital planetarium functions.
10 October 2013

The University of the Free State (UFS) is the first in the world to boast a modern digital planetarium which was erected within an existing observatory.

It is also the first planetarium of its kind for Sub-Saharan Africa.

“What makes the project unique is the fact that we convert the existing observatory structure into a modern digital planetarium. It hasn’t been done anywhere else,” says Andrew Johnson, engineer at Sky-Skan, the company supplying the equipment and also installing it.

Andrew has worked on similar projects, with his company installing digital planetariums around the world.

What makes the planetarium so special is the fact that it offers visitors an inclusive experience.

“Previously visitors could only watch projected stars and constellations, but with the digital planetarium they can now experience a journey through space which feels very close to reality.”

Andrew points out that, apart from stargazing and travelling through space, the digital planetarium allows the audience to visit planets, explore the secrets of the oceans or even organs in the human body.

The planetarium will also be used for concerts, state-of-the-art presentations, theatre productions, as well as meetings, conferences and exhibitions.

The auditorium can seat approximately 90 adults or 120 children.

The digital dome that was recently fitted into the existing observatory structure, is a 12-metre seamless aluminium screen complemented by a powerful surround-sound system and multiple data projectors from Sky-Skan. This results in an immersive experience of the digital universe, as well as the recreation of the macro and micro cosmos an a variety of other environments.

The planetarium will be officially opened on Friday 1 November 2013 by Derek Hanekom, Minister of Science and Technology. Prof Matie Hoffman from the Department of Physics at the UFS is delighted at this visit from Minister Hanekom.

“This recognition and national interest demonstrates the importance and contribution of the first digital planetarium in Sub-Saharan Africa to science and astronomy.  It is also evidence that a facility like this is important for the training of the next generation of scientists.”

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